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A crystalline heterocyclic carbohydrate, C₁₇ H₁₄ O₆, produced by the pea plant as a fungitoxic phytoalexin.
1960s. From pis- (in scientific Latin pisum) + sat- (in scientific Latin sativum) + -in, after scientific Latin Pisum sativum, taxonomic name of the pea plant (from classical Latin pisum pea + satīvus).